Angular实现购物车计算示例代码

使用AngularJS实现一个简单的购物车，主要感受强大的双向绑定和只关注对象不关注界面特性。

先看看界面：

点击+-操作和删除：

这些全部只需要操作数据源就行，不需要关注界面。

实现过程：

一、使用任何语言创建一个服务端：

 public class ShoppingCar
 {
 public string Title { get; set; }
 public decimal UnitPrice { get; set; }
 public int Count { get; set; }
 }

public ActionResult GetCar()
 {
 List<ShoppingCar> cars = new List<ShoppingCar>
 {
 new ShoppingCar { Title="苹果",Count=1,UnitPrice=2.5m},
 new ShoppingCar { Title="香蕉",Count=3,UnitPrice=1.5m},
 new ShoppingCar { Title="苦瓜",Count=1,UnitPrice=3.5m},
 new ShoppingCar { Title="黄瓜",Count=3,UnitPrice=2.2m}
 };
 return Json(cars,JsonRequestBehavior.AllowGet);
 }

 public ActionResult AddCar(List<ShoppingCar> car)
 {
 return Json("ok", JsonRequestBehavior.AllowGet);
 }

二、前台实现：

 <div ng-app="DemoApp" ng-controller='CartController'>
 <table class="table table-striped">
 <thead>
 <tr>
 <td>标题</td>
 <td>单价</td>
 <td>数量</td>
 <td>小计</td>
 <td>删除</td>
 </tr>
 </thead>
 <tbody>
 <tr ng-repeat="item in ShoppingCar">
 <td>{{item.Title}}</td>
 <td>{{item.UnitPrice}}</td>
 <td>
 <input type="text" ng-cloak ng-model="item.Count" style="width:50px;text-align:center;">
 <button my-adds ng-click="UpdateCar(item.Title,1)" ng-class="{cursors:true}">+</button>
 <button my-minus ng-click="UpdateCar(item.Title,-1)" ng-class="{cursors:true}">-</button>
 </td>
 <td>{{item.Count*item.UnitPrice | number:2}}</td>
 <td><button my-minus ng-click="UpdateCar(item.Title,-100)" ng-class="{cursors:true}">删</button></td>
 </tr>
 </tbody>
 </table>
 <p ng-init=0>总价格：{{ total | number:2}}</p>
 <button type="button" ng-click="submit()">提交</button>
 </div>

三、Angular部分  

 var app = angular.module('DemoApp', []);

 app.controller('CartController', ['$scope', '$http', function ($scope, $http) {
 $scope.ShoppingCar = {}
 var GetCar = function () {
 $http.get('/Employee/GetCar')
 .success(function (response) {
 $scope.ShoppingCar = response;
 GetTotal();
 });
 }
 $scope.total = 0;
 var GetTotal = function () {
 for (var i = 0; i < $scope.ShoppingCar.length; i++) {
 var item = $scope.ShoppingCar[i];
 $scope.total += item.Count * item.UnitPrice;
 }
 }

 $scope.UpdateCar = function (title, count) {
 for (var i = 0; i < $scope.ShoppingCar.length; i++) {
 var item = $scope.ShoppingCar[i];
 if (item.Title == title) {
 item.Count = item.Count + count;//这里可以增加上下限制
 if (item.Count < 0) {
 $scope.ShoppingCar.splice(i, 1);
 }
 }
 }
 GetTotal();
 }
 $scope.submit = function () {
 $http.post('/Employee/AddCar', $scope.ShoppingCar)
 .success(function (response) {
 alert(response);
 });
 }
 GetCar();
 }]);

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。